A LIN28B polymorphism predicts for colon cancer survival

Abstract

The pathogenesis of sporadic colorectal cancer involves distinct pathways, with characteristic genomic alterations. The first pathway, chromosome instability (CIN ), is driven by APC mutations and is typified by Kras mutations, p53 mutation/loss of heterozygosity, and deletions at chromosome 18q. The second pathway is referred to as microsatellite instability (MSI), a genetic hallmark of the accumulated mutations that occur as a consequence of derangements in the mismatch repair genes. Finally, proximal colon cancers may involve methylation of a number of genes, which is frequently referred to as the CpG island methylator phenotype (CIMP), and are associated with B-raf mutations. The ability to stratify colorectal cancers by risk would be facilitated by the identification of polymorphisms that might be utilized as biomarkers. LIN 28B is an RNA binding protein that is overexpressed in colon cancers. We find that LIN 28B rs314277 is associated with significant recurrence of colorectal cancer in Stage II disease, which may have translational therapeutic implications. © 2012 Landes Bioscience.